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Parasitology > Parasitology Prac Exam > Flashcards

Parasitology Prac Exam Flashcards

1
Q

Describe an Oocyst

A

Oocyst

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2
Q

Describe an oocyst

A

Egg like stage of coccidian parasite (Apicomplexa)

Passed in the faeces in the undeveloped (unsporulated form)

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3
Q

Examin a Cat

Example in a Dog

Example in a Pig

Example in a Horse

A

Toxocara Egg

Toxocara Cati

Toxoccara Canis

Ascaris Suum

Parascars Equorum

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4
Q
A

Eggs of Toxocara spp (T.canis or T.cati)

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5
Q
A

Trichus Egg

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6
Q
A

Eggs of Trichus Spp

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7
Q
A

Large Egg = Nematodirus

Small Egg = Strongylid

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8
Q
A

Strongylid Egg

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9
Q
A

Nematodirus egg

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10
Q
A

Unfed Larvae

Larval ticks have 6 legs rather than 8, but otherwise appear similar in shape to the adult but are much smaller

Sometimes referred to as the seed ticks due to their small size, larvae seek out a new host, often clambering to the tops of blades of grass to acheive this

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11
Q
A

Haemaphysalis Eggs and Larvae

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12
Q
A

Haemaphysalis Adult

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13
Q
A

Unfed and Fed Nymphs

The nymph has 8 legs like the adult, but is still smaller and must undergo one last moult

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14
Q
A

Haemaphysalis Longicornis - mouthparts

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15
Q
A

Adult Haemaphysilas Logicornis

This tick is an adult female specimin, that has not yet fed.

All adults of this specimen are females

Have a dark dorsal shield extending back behind the mouthparts

Adults have 8 legs that attach to the ventral surface of the anterior portion of the body in two rows. The mouthparts point fowards

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16
Q
A

Top = engorded

Bottom = unfed

Haemophilaus longicorns adults

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17
Q

Sheep, Cattle and Horses

A

Chorioptes Bovis

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18
Q
A

Can be found on sheep, cattle and horses

Scrotum of rams tail of cattle and legs of horses

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19
Q

Bird

A

Cnemidocoptes mutans

A burrowing mitee causing scaly leg in birds particulary chickens

Note very short legs - hindpairs do not project beyond the posterior margin of the body

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20
Q
A

Demodex Mite

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21
Q
A

Localised Demodex

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22
Q
A

Generalised Demodex

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23
Q
A

The small cigar shaped mite lives in the hair follicle

Narrow shape allows it to live beside the hairshaft

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24
Q
A

Demodectic mange - follicles become distended with large numbers of mites and purulent material and the hair shafts fall out

Distended follciles appear as pustules and may rupture and there may be a more severe inflammatory reactions

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25
Q
A

Cheyletiella

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26
Q
A

Non- Burrowing Mite Chyletiella

This large mite wanders over the skin surface and is just visible to the naked eye

Walking dandruff

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27
Q
A

Chyletiella Species

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28
Q
A

Chyletiella

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29
Q

Guinea Pig

A

Trixacarus Caviae

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30
Q
A

Trixacarus ccaviae

Guinea Pig mite

A sarcoptiform mite which causes skin disease in guinea pigs

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31
Q
A

Otodectes Cynotis

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32
Q
A

Non-burrowing mite

The legs of otodectes are long and project well beyond the body margin

The forth leg is a little shorter than the others

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33
Q
A

Otodectes can be seen with the naked eye

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34
Q

Rabbits and Horses

A

Psoroptes cuniculi

Found in the ears of animals such as rabbits and horses

All herbiores

Related to sheep scab

causes otitis externa

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35
Q
A

Sarcoptes Scabei

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36
Q
A

Sarcoptes mites have 8 legs in the adult and the nymph stages. The legs are short and stumpy and and the hind legs do not project much beyond the posterior body margin

Each leg bears a sucker on a stalk

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37
Q
A

Sarcoptic Mange

Sarcoptes mites burrow into the superficical layes of the epidermis and cause the very itchy condition sarcoptic mange

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38
Q
A

Pulex Irritans

Note: Absence of combs

Absence of combs below and behind its head

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39
Q
A

Flea Larvae

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40
Q
A

Ctenocephalides

41
Q
A

Ctenocephalides felis

42
Q

Cat

A

Felicola Subroutratus

A biting lice found on cats

Distinctive pointed head

43
Q
A

Comparison of biting and sucking lice

44
Q

Dog

A

Trichodectes canis

Biting louse of dogs

45
Q

Dog

A

Linognathus setosus

Sucking louse of dogs

46
Q

Pig

A

Haematopinus suis

Large sucking louse found on pigs

47
Q

Horse

A

Haematopinus asini

The horse sucking louse

VERY BIG

48
Q

Horse

A

Bovicola equi

Biting lice of horse

49
Q

Sheep

A

Linognathus pedalis

Hairy parts of sheeps legs

L1 smaller than L2

50
Q

Sheep

A

Bovicola ovis

Biting lice of sheep

Looks similar to B. Bovis

51
Q

Cattle

A

Lingonathus vituli

Sucking louse of cattle

Lousy animals are dirty

52
Q

Cattle

A

Bovicola bovis

Biting lice of Cattle

53
Q
A

Oestrus ovis adult

54
Q
A

Oestrus ovis larvae

How to diffirentiate fron Gatrophilus?

55
Q
A

Oestrus ovis adult female

Less hairy then the bot fly

Mouth parts are degenerate and they do not feed

56
Q
A

Oestrus ovis third stage larvae

They are found in the frontal sinus of the sheep where they feed on the muccosal lining and nasal secretions

57
Q
A

Gasterophilus larvae

The L1 through to L3 can all be found inside the horse

58
Q
A

Horse bots - Larvae

Parasites in the stomach - ventral view of the third stage larvae

59
Q
A

Gastrophilus Adult

60
Q
A

Bot fly of horses

Hairy bee like fly

With no mouth parts, adults do not feed

Sole job is to reproduce

61
Q
A

Stomxys Calcitrans

62
Q
A

Stomoxys calcitrans

Stable fly - blood sucking disese vector

Common in NZ

cause of irriations to cattle, horses, humans

63
Q
A

Head of Stomays calcitrans the stable fly

in feeding the entire proboscis is thrust into the skin of the host

64
Q
A

Calliphora vicina

Bluebottle flies can also be secondary flies

65
Q
A

Calliphora vicina

66
Q
A

Chromosoma rufficacies

Bright green, bands of black colour

Commonest secondary flystrike species

Resembles Lucillia but each body segment has a band

Maggots are SPIKY

67
Q
A

Calliphora stygia

NZ third primary flystrike blowfly species

Blackish body that is coloured with fine golden brown hairs

68
Q
A

Lucilia Sericata

No black bands

Primary strike

69
Q

Genus Lucillia

A

Classic greenbottles

Lucilia Cuprina relies on live sheep

L sericatea and L cuprina are both primary srike species and are hard to tell apart

70
Q
A

Giardia

71
Q
A

Babesia (dark red inclusion bodies in RBCs)

Transmitted by a tick

72
Q
A

Thileria orientalis

How to tell apart from Babesia?

73
Q
A

Thileria parva

74
Q
A

Sarcocystitis gigantea

Large macro sarcocysts in the muscle

75
Q
A

Sarcocyst

76
Q
A

Sarcocystitis

77
Q
A

Syngamus trachea

78
Q
A

Syngamus Trachea

Small male and much larger female in copulation

79
Q
A

Synagmus trachea

Found in the trachea of numerous avian species

Common name is grapeworm

80
Q
A
81
Q
A

Aeluostrongylus abstrusus

82
Q
A

Left + inflammatory cells and eggs *

Right = normal

83
Q
A

Aeluostrongylus abstrusus head

84
Q
A

Aeluostrongylus abstrusus tail

85
Q
A

Dictocaulus viviparus gross specimem

86
Q
A

In the larger airways covered by foamy mucus

87
Q
A

Corss sections of females can be seen containig larvated eggs in the small airways. Epithelium is hypertrophied

88
Q
A

up to 10cm long can be found in the bronchioles, bronchi and occassionally the trachea

More likely yo be found in diaphragmatic lobe

Direct lifecycle

89
Q
A

Dictocaulus spp. tail

90
Q
A

Dictocaulus spp. head

91
Q
A

Metastongylus spp

Found in the bronchi, brochioles of pigs mainly in the diaphragmatic lobe

92
Q
A

Metastrongylus spp

Anterior end: Simple mouth surrinded by obvious lips (two lateral lips each with three lobes)

93
Q
A

Matastrongylus spp. gross specimen

94
Q
A

Filaroides osleri
Note: bumps at biforcation (tracheal)

Slender worms are hard to remove from nodules

95
Q
A
96
Q
A
97
Q

Cat Strongylid

A
98
Q
A

Parasitology (1 decks)

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